A developer is creating rules to help launch a company's Smart Widget product.

C. Opportunity, Account: For a rule targeting the launch of a new product specifically for existing S2B customers and only within opportunities, the appropriate context scope for the context mapping should include both 'Opportunity' and 'Account'. This combination allows the rule to evaluate conditions that pertain to the opportunity details as well as the customer account status, ensuring the rule applies only in the correct contexts of existing S2B customers involved in opportunities.